List of Brands begin with "O"
- OAKLEY (23 companies)
- OBAGI (3 companies)
- OBERON (3 companies)
- OCEAN (4 companies)
- OEM (10 companies)
- OGURA (9 companies)
- OHAUS (4 companies)
- OHO (3 companies)
- OKACHI (3 companies)
- OKI (24 companies)
- OKONITE (3 companies)
- OKUDA (3 companies)
- OLIVETTI (7 companies)
- OLYMPIA (5 companies)
- OLYMPUS (57 companies)
- OMEGA (17 companies)
- OMRON (11 companies)
- ONKYO (5 companies)
- ONO SOKKI (4 companies)
- OPEL (4 companies)
- OPEN (3 companies)
- OPTEX (5 companies)
- ORAL B (6 companies)
- ORIENTAL (6 companies)
- ORIENTAL MOTOR (3 companies)
- ORION (11 companies)
- OSAKA (4 companies)
- OSRAM (12 companies)
- OTICON (3 companies)
- OZAK (3 companies)
Latest updates of brands